Question: How to set syntax highlighting rules programmatically on the fly

I am able to set some syntax highlighting rules with textEditor.SyntaxHighlighting.MainRuleSet.Rules.Add() Unfortunately, changes to this list are not applied to the editor on the fly and I haven’t found any method to trigger a refresh once the editor is loaded.

I intended to use AvalonEdit to highlight multiple user defined values in log files. Is this possible?

Best regards, Carsten

[blakepell]

It is, link below. I’ll make a few disclaimers. I’m only handling 24’ish colors and underline/reverse (most multi-user dimension games only support those colors). A little hacky but I strip the rest of the codes out I don’t support before it gets to the terminal. Also, the DocumentColorizingTransformer provides you a line to colorize so to make things easier on myself I provided everything I need to format that line in the line (if a color was started on line 24, when 25 comes down from the server I include the last color from the previous line at the start of line 25), that way, no matter what line or what order AvalonEdit gives me lines in I can color/style it correctly.

Although on reviewing this code just now I see a bug where if I have a style (underline) and a color it only brings the last ANSI code over to the next line. I’ll need to fix that.

Here’s the link, the AvalonTerminal folder has most of the pieces in it including the AnsiColorizer. I welcome any feedback.

Repo: https://github.com/blakepell/AvalonMudClient Folder: https://github.com/blakepell/AvalonMudClient/tree/master/src/Avalon.Client/Controls/AvalonTerminal

[blakepell]

I’m currently writing / using AvalonEdit to render text that’s colored with ANSI control sequences (think of an SSH window coloring text, that’s exactly it). For this I used a DocumentColorizingTransformer which fires for lines rendered to the screen (and the you do the color stuff in code). As an example, I could add more ANSI control sequences on the fly if I wanted to (I already know them all but the variables for the rule could come from a database, a file, user input, etc).

Create a class that inherits from “DocumentColorizingTransformer” and then fill in the pieces in the ColorizeLine method you override. The C# route should be flexible enough to implement dynamic rules. Then you just add that class into the TextArea.TextView.LineTransforms list.